Machine for forming concrete sewer-pipe.



.II/I. SCHENK & I. H. STEWARTI MACHINE FOR FORMING CONCRETE SEWER PIPE.

APPLICATION FILED JAN-8.1917.

Patented; Nov. 2?, 1917,

lg ipl n 2 SHEETS-SHEET I.

I Ill/ 1 041 37 004,

Inventors, J07??? J71. Schenk, and John HSewart, 251

' ttorrzzy.

J. M. SCHENK & J. H STEWART.

MACHINE FOR EORMING CONCRETE SEWER PIPE.

APPLICATION FILED JAN. B. 1917- Patented NW. 27, 1917.

2 SHEETSSHEET 2.

Fig #3.

fray/e71 Card, John M, fisher? 7i; and John 1/. Stewart, 59/

Attorney.

JOHN M. SGHENK AND JOHN H.

syrnwan'r, or wnrnanoo, IOWA, assrenons 'ro PIONEER MANUFACTURING COMPANY, OF WATERLOO, IOWA, A COEPOER'ATIUN OF IOWA.

MACHINE FOR FORMING CONCRETE SEWER-PIPE.

Specification of Letters Patent.

Patented Nov. 22, 12912.

Application filed January 8, 1917. serial no. 141,254..

To all whom it may concern:

Be it known that we, JOHN M.. SGHENK and JOHN H. STEWART, citizens .of the United States of America, and residents of Waterloo, Blackhawk county, Iowa, have invented certain new and useful Improvements in Machines for Forming Concrete Sewer-Pipe, of which the following is a specification. I

Our invention relates to improvements in machines for forming concrete sewer-pipe, and the objects of our improvements are, first, to supply such a machine with means for forming the bell-ends on pipe-sections; and second, to adapt the former for the bellends to serve as a platen therefor in combination with the mold-casing.

These objects we have accomplished by the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Fig. 1, is a central longitudinal section of a moldcasing with our improved pipe-forming mechanism within and operatively associated therewith, the pipe-forming parts being shown as unolutched and separated from each other; Fig. 2 is a similar sectional view of said devices, with the pipe-forming parts clutched together; Fig. 3 is a top plan view of the basal supporting cross-bars for the bell-end former; Fig. 4; is a side elevation of the combined intermediate supporting body for said bell-end former, and the lower clutch-member; Fig. 5 is a top plan view of the bell-end former and the said intermediate combined support and lower clutch-member; Fig. 6 is an under plan view of said bell-end former; Fig. 7 is an under plan View of the upper former-head and its depending counterpart clutch-member, and Fig. 8 is an upper plan view of the upper former-head, with parts thereof in horizontal section.

Similar numerals of reference denote corresponding parts throughout the several views.

The numeral 17 denotes a supporting table, having one or more openings 19, and may be either fixed or movable. Upwardly extending studs 18 are mounted on this table surrounding said opening. U-shaped crossbars 36 form a spider which depends through said opening and the ends of whose members are bent outwardly to rest upon the table and have orifices to receive the studs 18.

The numeral 21 denotes a cylindrical mold-casing, which can be constructed in halves hinged together and detachably connected by an suitable separable fasteningmeans,.not s own. One end ,of this moldcasmg is enlarged in diameter at 22 to provide a bell-shaped end. Arms 20 are fixed to the outer wall of the bell-end 22 with their lower depending parts bent outwardly horizontally and provided with orifices to permit them to be mounted upon said studs 18, to maintain said mold-casing fixed relative to said table and spider 36.

The numeral 11 denotes a vertical shaft whose lower end is diminished to pass through registering orifices in the cross-bar or spider 36, with its lower end 16 threaded to receive a securing-nut 15. This shaft 11 lies within the axis continued of the superposed mold-casing 21, and upon it is rotatably mounted an integrally combined intermediate supporting-body or spider 13 and hub 7 having upwardly extending oppositely-located clutch teeth 10.

The upwardly curved spider-arms 13 have upwardly extending pins 9 receivable into sockets .in the lower face of a horizontal flange 1 on an annular frustal bell-end former 2 which has an inwardly extending horizontal flanged part 4. The lower end of the bell 22 of said mold-casing 21 rests upon the upper surface of the outer flange 1 of said former 2 concentrically, thus closing the lower end of said casing, the said former with its outwardly and inwardly extending flanges 1 and 4 respectively, thus supplying a pallet for the lower end of the casing as well as a rotatable forming body adapted to form the bell-end of a sewer-pipe within the bell 22 of said casing.

The pallet or former 2 has a plurality of depressions 3 at the angle of junction between the frustal part 2 and the inwardly extending flange 4:, for a purpose to be described hereinafter.

A rotary shaft 25 is extended axially into the mold-casing 21, and by means of suitable mechanism, not shown, may be moved to and fro longitudinally therein. Said shaft has a diminished threaded end 26 till received into an interiorly threaded socket in an enlarged part of an alined shaft-part 28, said shaft part 28 having a diminished threaded lower end received into a central threaded opening in a cylindrical formerbody 29.

The shaft part 28 has, just above the top of the former-head 29, oppositely extendin arc-shaped members 32 upon which are achustablymounted the convex trowelingbodies 33 by means of bolts 3 1 passed through said troweling-bodies and through slots 37 in the said members.

The cylindrical former-body 29 has its lower part hollowed out, with integral clutch teeth 30 dependin co-axially through the hollow and for a istance therebelow. These clutch teeth 30 are in the form of a pair of oppositely disposed detents, the counterparts of the like pair of detents 10 on the lower hub 7.

Operation.

When the mold-casing 21 is detachably mounted upon the studs 18 of the supporting bodies 17, with the pallet 2 mounted upon the spider-arms 13, and the formerhead 29 connected to the shaft 25 and extended axially into the mold-casing, the machine is in a position to form a bellend sewer-pipe section of concrete material deposited within the open upper end of said mold-casing, by any suitable means, not shown.

The shaft 25, while in rotation, is given a longitudinal movement through said moldcasing and back again, the convex troweling-bodies 33 acting to trowel the plastic material against the inner wall of the easing followed b the smoothing action of the depending ormer-body 29, to compress and form the cylindrical body 23 of a pipesection therebetween.

When the former-body 29 passes down fittingly through the central opening of the pallet or lower forming-body 2, the upper clutch teeth 30 enter into mesh with the lower clutch teeth 10, whereby like rota-- tion is imparted to the former-body 2 by the mediumof the connected spider arms 13. Since the frustal portion of the former body 2 is extended upwardly concentrically within the enlarged or bell-shaped end 22 of the casing 21, it trowels the plastic material by means of its cheeks of depressions 3 against the inner walls of said bell-end, which thus forms a compact, homogeneous and smoothly finished enlarged or hellshaped extremity 24 to the pipe-section 23, the two horizontal flanges 1 and 4: serving to finish and smooth the abutting parts of the section.

As the shaft 25 is moved upwardly when its longitudinal movement through the 85 mold-casing 21 is reversed, the upper clutch 30 becomes disengaged from the lower clutch member 10, as shown in Fig. 1, and the former-head 29 may 'be withdrawn from the mold-casing. The pallet 2 may have integral depending legs 5 to support it and said casing with the inclosed freshly formed pipe section 23--24 when said bodies have been removed from the table 17 to some other supporting surface after disengaging the bracketed arms 20 from the table studs 7 sewer-pipe, a bell-end mold-casing, a formerbody rotatable within the bell-end of said casing and having a detachable clutch member and a rotatable former-body in said casing movable longitudinally therein and having a clutch-member mating detachably with the other clutch-member.

2. In a machine for forming concrete sewer-pipe, a bell-end mold-casing, a pallet having a circumferential rim closing the bell-end thereof and mounted for rotation only, engaging-means on said pallet, and a rotatable clutch-member movable into and out of engagement with the engaging-means on said pallet.

3. In a1 machine for forming concrete sewer-pipe, a bell-end mold-casing, a rotatable annular pallet having an annular rim closing the bell-end thereof, said pallet having troweling depressions opposite the inner wall of the mold-casing, and means detachably connected to said pallet for rotating it.

l. In a machine for forming concrete sewer-pipe, a relatively fixed bell-end moldcasing, a rotatable separable annular pallet having an annular rim closing and supporting the open bell-end of said casing, said pallet having a part entering the hollow of said bell-end concentrically and supplied with a troweling depression opposite the inner wall of the bell-end, and means for rotating said pallet.

5. In a machine for forming concrete sewer-pipe, a relatively fixed bell-end moldcasing, a rotatable annular former in said bell-end having an annular rim for closing and supporting the bell end, separable therefrom and restrlcted from longitudinal movements relative to said casing, and a rotatable clutch-device movable longitudinally through said casing and adapted to be separately engaged with said former to impart rotation thereto.

6. In a machine for forming concrete raaaois sewer-pipe, a relatively fixed bell-end moldcasing, a rotatable annular former having an integral part for supporting and closing the bell-end thereof and having a frustoconical part extending thereinto, said frustoconical part having troweling depressions therein, and means for rotating said former.

7 In a machine for forming concrete sewer-pipe, a mold-casing, a rotatable former closing one end of said casing, engaging and supporting the end of the casing to be restricted from longitudinal movement relative thereto, and a rotatable former movable longitudinally through said mold-casing, said formers having mating clutchmembers.

8. In a machine for forming concrete sewer-pipe, a mold-casing, a support therefor, separable connections between said mold-casing and said support adapted to maintain them in relatively fixed positions, consisting of studs on said support and fixed brackets on the casing having orifices de tachably receiving said studs, a pallet closing one end of said casing and supplied with a former having troweling depressions, said pallet having a rotatable support with clutchmembers, and a rotatable troweling former-head movable longitudinally through said mold-casing and pallet and having clutch-members adapted to mate separably with the clutch-members on said pallet suport.

p 9. In a machine for forming concrete sewer-pipe, a bell-end mold-casing, supporting-means to which said casing is detachably secured, consisting of brackets fixedly depending from the casing and engagingmeans fixed on the supporting-means detachably engaged therewith, a rotatable formerhead movable to and fro within said casing,

and having a clutch-member, and a former within the bell-end of said casing rotatably engaged therewith and having a clutchmember detachably mated with the other clutch-member.

10. In a machine for forming concrete sewer-pipe, a bell-end mold-casing, a support to which the bell-end of said casing is detachably secured, a clutch-member concentrically rotatably mounted upon a sup-- port below the said bell-end, a. pallet having a part engaging, supporting and closing the said bell-end and havin a central opening, a rotatable former-head movable centrally and" longitudinally through said mold-casing and said pallet, said former head having a clutch-member mating with the first-mentioned clutch-member, and said pallet being detachably connected to the first-mentioned clutch-member to be rotated therewith when both members are mated.

11. In a machine for forming concrete sewer pipe, a bell-end mold-casing detachably mounted, a rotatable annular pallet underlying, engaging, supporting and closing the bell end of said mold-casing, said pallet having one or more troweling surfaces, and having a central orifice to allow a rotating reciprocating former-head to pass to and fro therethrough.

12. In a machine for forming concrete sewer-pipe, a bell-end mold-casing, a rotatable annular pallet having a rim engaging and supporting the adjacent end of and closing the bell-end thereof, said pallet having one or a plurality of troweling cheeks, forming depressions therein and opposite the inner wall of the mold-casing, and means detachably connected to said pallet for rotating same.

13. In a machine for forming concrete sewer-pipe having a former head rotatable and moving longitudinally through a bellend mold-casing, and having a clutch member attached at the lower end of said former head, a pallet in said bell end, a clutch member detachably supporting the pallet-and mating with the firstmentioned clutch member, and also rotating said pallet and support in connection with said for! er head, the said pallet having one or more troweling surfaces, and a rim engaging and support ing the abutting end of said bell end making an auxiliary packer for forming the bell of said pipe.

14. In a machine for forming concrete bell-end sewer pipe, a bell-end mold-casing, a rotating former-head, and movable longitudinally therewith, a clutch member at the lower end of said former head, a clutch member supporting an auxiliary, detachable former-head pallet, engaging the first-mentioned clutch-member, and rotating the said pallet and support while engaged therewith, the said detachable pallet adapted to be jointly used as a means for forming the bell end of said pipe,.as well as a support and protection in moving said pipe after being formed.

Signed at Waterloo, Iowa, this 23rd day of Dec, 1916.

JOHN M. soHENK. JOHN H. STEWART.

Witnesses:

PEARL STANTON, Gr. C. NNEDY. 

